<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        .box {
            min-height: 100vh;
            background-color: #f07373;
            display: flex;
            /* align-items: center; */
            flex-direction: column;
        }



        .box .header {
            height: 100px;
            background-color: #fff;
            display: flex;
        }

        .box .content {
            /* height: 100px;
            background-color: #fff;
            display: flex; */
            /* align-items: center; */
            flex: 1;
        }

        .box .footer {
            height: 100px;
            background-color: #fff;
            display: flex;
            /* align-items: center; */
        }
    </style>
</head>

<body>
    <div class="box">
        <div class="header">1</div>
        <div class="content">
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
            <p>11111111111</p>
        </div>
        <div class="footer">3</div>
        <!-- <div>2</div> -->
    </div>
</body>

</html>